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#!/usr/bin/env python3
# -*- conding: utf-8 -*-
'练习内建模块之hmac'
__author__='sergiojune'
importrandom, hmac# 这个模块是可以根据口令进行加密保存数据,相当于md5加slat的效果,还比他强
message=b'hello world'
key=b'key'
# 第一个和第二个参数都必须是bytes类型
p=hmac.new(key, message, digestmod='md5') # 指定md5算法,一个参数为口令,第二个为加密的信息
print(p.hexdigest())
# 作业:将上一节的salt改为标准的hmac算法,验证用户口令
defhmac_md5(key, s):
returnhmac.new(key.encode('utf-8'), s.encode('utf-8'), 'MD5').hexdigest()
classUser(object):
def__init__(self, username, password):
self.username=username
self.key=''.join([chr(random.randint(48, 122)) foriinrange(20)])
self.password=hmac_md5(self.key, password)
db= {
'michael': User('michael', '123456'),
'bob': User('bob', 'abc999'),
'alice': User('alice', 'alice2008')
}
deflogin(username, password):
user=db[username]
returnuser.password==hmac_md5(user.key, password)
# 测试:
assertlogin('michael', '123456')
assertlogin('bob', 'abc999')
assertlogin('alice', 'alice2008')
assertnotlogin('michael', '1234567')
assertnotlogin('bob', '123456')
assertnotlogin('alice', 'Alice2008')
print('ok')